Tornado watch issued for North Alabama until 3 a.m. Sun.
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Tornado watches are issued for large areas if tornadoes are possible. A warning is issued for a smaller area when a tornado has been spotted.
The storm system has already led to tornado warnings for parts of Jackson County and counties in Georgia. Alerts for the radar-indicated twisters broke into TV and radio broadcasts Monday morning.
Watches typically cover extensive areas, sometimes spanning multiple counties or states, and can remain in effect for several hours. During a watch, it's advisable to stay vigilant, monitor weather updates, and be prepared to seek shelter if conditions deteriorate.
When a warning is issued, take action. This means tornado conditions are imminent and have been spotted either by someone on the ground or by radar. Warning areas are typically smaller than those within a watch and are issued for a shorter time period, typically about 15 minutes.